Clinafloxacin (hydrochloride) (CAS No 105956-99-8) is an investigational antibacterial agent belonging to the fluoroquinolone class known for its broad-spectrum activity Originating from chemical modifications to enhance antibacterial efficacy it targets bacterial DNA gyrase and topoisomerase IV crucial enzymes for DNA replication and transcription Clinafloxacin exhibits potent antibacterial activity in the nanomolar to low micromolar range against various gram-positive and gram-negative bacteria It is frequently used in cell models and animal studies to evaluate antibacterial efficacy and resistance mechanisms Additionally it is utilized in drug screening assays to explore new therapeutic options for bacterial infections Experimental concentrations typically depend on the specific research design allowing flexibility in applications across different models and conditions